package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.AddressBook;
import com.sky.entity.OrderDetail;
import com.sky.entity.Orders;
import com.sky.entity.ShoppingCart;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.AddressBookMapper;
import com.sky.mapper.OrderDetailMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import io.swagger.util.Json;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理各种异常（地址簿为空，购物车为空）
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        if(addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        Long userId = BaseContext.getCurrentId();
        List<ShoppingCart> shoppingCarts = shoppingCartMapper.list(ShoppingCart.builder().userId(userId).build());
        if(shoppingCarts == null || shoppingCarts.size() == 0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表中插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress(addressBook.getDetail());
        orders.setUserId(userId);
        orderMapper.insert(orders);
        //向订单明细表中插入n条数据
        //批量插入
        List<OrderDetail> orderDetails = new ArrayList<>();
        for (ShoppingCart shoppingCart : shoppingCarts) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(shoppingCart,orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetails);

        //清空购物车
        shoppingCartMapper.deleteByUserId(userId);
        //封装OrderSubmitVO
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }

    /**
     * 支付成功修改订单状态
     * @param outTradeNo
     */
    @Override
    public void paySuccess(String outTradeNo) {
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map<String, Object> map = new HashMap<>();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号: "+outTradeNo);
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(ordersPaymentDTO.getOrderNumber());

        // 检查订单状态
        if (ordersDB == null) {
            throw new OrderBusinessException("订单不存在");
        }
        if (ordersDB.getPayStatus() == Orders.PAID) {
            throw new OrderBusinessException("该订单已支付");
        }

        // 直接模拟支付成功
        this.paySuccess(ordersPaymentDTO.getOrderNumber());
        log.info("模拟支付成功，订单号：{}", ordersPaymentDTO.getOrderNumber());

        // 构造模拟支付返回对象
        return OrderPaymentVO.builder()
                .nonceStr("模拟支付成功")
                .paySign("无需实际支付")
                .timeStamp(String.valueOf(System.currentTimeMillis()))
                .signType("RSA")
                .packageStr("prepay_id=模拟支付ID")
                .build();
    }

    /**
     * 查询历史订单
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery4User(int page, int pageSize, Integer status) {
       //设置分页
        PageHelper.startPage(page, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> ordersPage = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();
        // 查询出订单明细，并封装入OrderVO进行响应
        if (ordersPage != null && ordersPage.getTotal() > 0) {
            for (Orders orders : ordersPage) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(ordersPage.getTotal(), list);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);

        //根据订单id查询订单详情
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    /**
     * 取消订单根据订单id
     * @param id
     */
    @Override
    public void cancel(Long id) throws Exception {
        //查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }


        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        //核心步骤：就是将该订单加入到购物车中
        Long userId = BaseContext.getCurrentId();
        //根据id查询订单详情
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetails.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);

    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult search(OrdersPageQueryDTO ordersPageQueryDTO) {
        //分页查询
        //设置分页数据
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        OrdersPageQueryDTO ordersPage = new OrdersPageQueryDTO();
        ordersPage.setUserId(BaseContext.getCurrentId());
        BeanUtils.copyProperties(ordersPageQueryDTO,ordersPage);

        //分页查询订单
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList<>();
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long ordersId = orders.getId();
                Orders getOrders = orderMapper.getById(ordersId);
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(ordersId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(getOrders,orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }

        return new PageResult(page.getTotal(),list);
    }

    /**
     * 各个订单状态数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.getCountByStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.getCountByStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.getCountByStatus(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;

    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);

        }

        Orders build = Orders.builder()
                .id(ordersRejectionDTO.getId())
                .status(Orders.CANCELLED)
                .cancelTime(LocalDateTime.now())
                .cancelReason(ordersRejectionDTO.getRejectionReason())
                .build();
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
            build.setPayStatus(Orders.REFUND);
        }
        orderMapper.update(build);
    }


    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        Orders orders = new Orders();
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
          orders.setPayStatus(Orders.REFUND);
        }
        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        if(ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map<String, Object> map = new HashMap<>();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号: "+ ordersDB.getNumber());
        String json = JSON.toJSONString(map);

        webSocketServer.sendToAllClient(json);
    }
}

